<template>
  <CloudCascader
    style="width: 360px"
    :options="options"
    :load-data="loadData"
    placeholder="Please select"
    change-on-select
    @change="onChange"
  >
  </CloudCascader>
</template>

<script>
  export default {
    title: '10.动态加载选项',
    subTitle: '使用 loadData 实现动态加载选项。(注意：loadData 与 showSearch 无法一起使用。)',
    data () {
      return {
        options: [
          {
            value: 'zhejiang',
            label: 'Zhejiang',
            isLeaf: false,
          },
          {
            value: 'jiangsu',
            label: 'Jiangsu',
            isLeaf: false,
          },
        ]
      }
    },
    methods: {
      onChange (value) {
        console.log(value);
      },
      loadData (selectedOptions) {
        const targetOption = selectedOptions[selectedOptions.length - 1];
        targetOption.loading = true;

        // load options lazily
        setTimeout(() => {
          targetOption.loading = false;
          targetOption.children = [
            {
              label: `${targetOption.label} Dynamic 1`,
              value: 'dynamic1',
            },
            {
              label: `${targetOption.label} Dynamic 2`,
              value: 'dynamic2',
            },
          ];
          this.options = [...this.options];
        }, 1000);
      }
    }
  }
</script>

<style lang="scss">
</style>